phyto-, phyt-, -phyte
(Greek: a plant; growth; growing in a specified way or place; to produce)
A geophyte can be a crocus or tulip which is propagated by buds, on underground bulbs, tubers, or corms.
"Corms" are short swollen underground stem bases in some plants, such as crocuses and gladioli, that store food over the winter and produce new foliage in the spring. New corms often form on top of old ones and are used as a means of producing new plants.
2. Any marsh or bog plant.